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Subsystems and Systems

A Portable Base Station Installation and Commissioning Test System

Introduction to a base transceiver station test system capable of providing adaptable on-site testing for the verification of transmit and receive paths of base stations
March 1, 2002
Product Feature A Portable Base Station Installation and Commissioning Test System Racal Instruments Limited Slough, UK Testing in the field puts singular rigorous demands on both the engineer and test equipment used, with the installation and commissioning of field installed base stations presenting particular challenges. Specific considerations include being...
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A Complete Spectral System Analysis for RF/Microwave Engineers

A new spectral domain system simulator is featured
March 1, 2002
Cover Feature A Complete Spectral System Analysis for RF/Microwave Engineers Eagleware Corp. Norcross, GA Historically, RF and microwave system designers have been forced to resort to a hodgepodge of commercial and custom-written software to characterize and simulate the frequency-domain behavior of complex RF systems and subsystems. This approach tends...
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Measurement of On-wafer Transistor Noise Parameters Without a Tuner Using Unrestricted Noise Sources

Presentation of a method for calibrating the four noise parameters of a noise receiver that does not require a tuner
March 1, 2002
Technical Feature Measurement of On-wafer Transistor Noise Parameters Without a Tuner Using Unrestricted Noise Sources This article presents a method for calibrating the four noise parameters of a noise receiver which does not require a tuner. The method permits using general (mismatched) noise sources, which may present very different...
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Two-tone vs. Single-tone Measurement of Second-order Nonlinearity

Use of a method to correctly locate the second-order intercept point (IP2) from one- and two-tone tests
March 1, 2002
Technical Feature Two-tone vs. Single-tone Measurement of Second-order Nonlinearity Darioush Agahi, William Domino and Nooshin Vakilian Conexant Systems Inc. Newport Beach, CA This article describes how to correctly find the second-order intercept point (IP2) from one- and two-tone tests, and presents measurement results in support of the theory. Relation...
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Designing a Bluetooth Transceiver in RF CMOS

Presentation of a design methodology used to facilitate the rapid prototyping and design of an RFIC
February 1, 2002
Technical Feature Designing a Bluetooth Transceiver in RF CMOS Bob Koupal and Marshall Wang Signia Technologies Milpitas, CA Cory Edelman Agilent Technologies Westlake Village, CA The design of a 2.4 GHz Bluetooth transceiver RFIC in CMOS requires careful verification of key performance criteria at all stages of the design...
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Intermodulation Products for a Mixer Subjected to a Multi-carrier Signal

Use of a nonlinear mixer model to demonstrate how a transient simulation is used to predict the behavior of intermodulation products in a multi-carrier environment
February 1, 2002
Technical Feature Intermodulation Products for a Mixer Subjected to a Multi-carrier Signal Applying a multi-carrier signal to a mixer leads to a large range of intermodulation products. To perform a link budget of a multi-carrier transmit-receive system, it is important to predict the location and magnitude of those intermodulation...
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Cost-effective Wireless Antenna Measurement Systems

Introduction to two new antenna measurements systems for single- or dual-axis antenna pattern measurements in the wireless frequency ranges
January 1, 2002
Product Feature Cost-effective Wireless Antenna Measurement Systems MI Technologies Duluth, GA Two new antenna measurement systems have recently been introduced that add to the MI-3600 antenna measurement product line. The MI-3600 family is comprised of 20 antenna measurement systems for single- or dual-axis antenna pattern measurements in the popular...
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A CMOS-based Front-end Downconverter for GPS Applications

Description of a CMOS-based front-end downconverter used to downconvert incoming satellite signals from 1.575 GHz to an intermediate frequency of 1.023 MHz
January 1, 2002
Product Feature A CMOS-based Front-end Downconverter for GPS Applications Valence Semiconductor Irvine, CA The industry is striving for single-chip Global Positioning System (GPS) designs given the limited real estate available within cell phones, personal digital assistants (PDA) and other consumer electronic devices. Since GPS designs are typically comprised of...
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Antenna Selection to Minimize Pointing Requirements

Use of antenna optimization to ensure antenna pointing requirements are kept to a minimum
January 1, 2002
Technical Feature Antenna Selection to Minimize Pointing Requirements Traditionally, when designing a satellite communications system, an allowance is made in the link budget for pointing loss. The earth station's antenna size is then selected to achieve the desired gain margin. In this article, a different approach called antenna optimization...
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A Feedforward Power Amplifier with Loops to Reduce RX Band Noise and Intermodulation Distortion

Introduction to a new power amplifier developed to reduce amplified noise and intermodulation distortion signals using a feedforward technique
January 1, 2002
Technical Feature A Feedforward Power Amplifier with Loops to Reduce RX Band Noise and Intermodulation Distortion This article proposes a new power amplifier approach for the reduction of amplified noise signals in the receiver (RX) band as well as intermodulation distortion signals in the transmitter (TX) band using a...
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